PS Magazine - MARCH 1986
PS, The Preventative Maintenance Monthly
ISSUE 400
MARCH 1986
M901 /M901A1 ITV, M981 FISTV .±²
Get Your Hatch BumpeRs
For want of a rubBer Bumper you may lose a finger, a hand or even yoUr
life. ±otH the driver's hatch and
²
the gunner's Hatch on tHe ITV and FIS³V
Have Bumpers to aBsorB shock when the hatches are locked open.
´f the Bµmpers are missing, there's
nothing ¶o take up the sHock except
the lockinG mechanism. THe lock
sometimes
fails when the hatcH
Bounces. EyeBall your carrier's
hatches. If there's a missing Bumper,
Get your mech to replace it now. AlL
the hardware needed· is in TM 9-
2350¸2¹9¸20P for the I³V and ³M
9¸23¹0¸266-24P for the FISºV.
M577A1 / A2 Command
'
Post VehiclEs ±³³
New GROUnd fOR
J
:>Omelights
»ere's a quick fix for Broken ground Lead Conta¼ts in tHe carrier
²
s domeLigHts:
Replace the contacts witH termi-
WH´N µH¶· OLD ¸ONµ¹¸µ
nal lUg, NS½ ¹940-01¸013-8288. I'LL
br´¹k· Off ºº»
save Having to replace tHe ent¾re
lamp assemBly.
WHen tHe old contact Breaks o¿fÀ
removeÁHat's left of tHe contact anD
wire in the lug.
Slip tHe lug under a mounting
screw to
·
make a new ground.
10
º º º r´pL¹¸´ w¶µH µ´r¼¶N¹L
½u
¾
g¿ ÀÁÀ ÂÃ4Ä-ÄÅÆÄÅ3-ÇÈÇÇ
³o get electricity to the
caB of your howitzer, you've
got to keep slip ring segÂ
ments
and contact arm
Brushes clean and gapped
right.
³hat's clean Ã
as in no
grease or oil. Ärease and oil
keep Brushes from making
good contact with the slip
ring segments. ½o juice
means no power to caB comÅ
ponents and ins¶ruments.
You crewmen do your
part By Being real careful
when you luBe the caB race
ring. Follow the word in
the ÆO (either ÆO 9¸23¹0¸
217-12] orÆÇ9¸23¹0¸303-
12).
Æightly luBe the race surfaces, springs/ separatÈrs and Balls with ÄAA.
Y Éu mechanics take care not to overluBe the traversing
Ê
mechanism ring
Ë
gear and ou¶put drive gear. ´f ÄAA drips onto the slip rÌÍÎ segments and
Brush holders, you'lL get an electrical fÏilure.
.±
·
²
³o get the right contac¶ arm
Ð
Ñ
gJÒ
use a feeler gage for the
Ó
0.1
ÉÊ
³
ÔÕiÖ
clearance needed.
Ë
ÌÍ:
´
See Pages 7¸3 and 7
+
×Ø
f
Ù
]t
9¸
23¹0Ú2l7-20½
Û
(Ml09Al
ÎÏÐ
A3
models) or Pages 4¸1¹ th
Ü;Ý
¥
Þ19
ß
of
TM 9-23¹0-303¸20¸2 (M 109A2
models) .
MAR 86
¹r¼·
11
Äap them rightà keep them cláan
â
ãnd the jäice will flow your way.
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